Population ecologists follow the fate of same-age cohorts toa. determine a population's carrying capacity.b. determine the birth rate and death rate of each group in a population.c. determine if a population is regulated by density-dependent processes.d. determine the factors that affect the size of a population.

A population that is growing logistically __________.

A wildlife biologist is trying to predict what will happen to a bear population if bear hunting is banned. He had the equations all worked out but then realized that he had grossly underestimated the amount of food available to the bears. To make his prediction more accurate he should __________ the value of __________ in his equation. (Consider food to be a factor that limits the size of the bear population.)

A population that grows rapidly at first and then levels off at carrying capacity can be modeled __________.

Assuming that r has a positive value, in the formula dN/dt = r_maxN(K – N)/K, the factor rN tends to cause the population to do what?

Use this graph of the idealized exponential and logistic growth curves to complete the following. a. Label the axes and curves on the graph.b. Give the formula that describes the blue curve.c. What does the dotted line represent?d. For each curve, indicate and explain where population growth is the most rapid.e. Which of these curves best represents global human population growth?

What is usually true of exponential growth? Select True or False for each statement.T/F The population is growing.T/F The per capita growth rate is constant.T/F The per capita growth rate increases rapidly over time.T/F The per capita growth rate is very high.

Add labels to the figure that follows, which illustrates the predicted pattern of changes in human population growth rates when death rates fall.

A population's carrying capacitya. may change as environmental conditions change.b. can be accurately calculated using the logistic growth model.c. increases as the per capita population growth rate decreases.d. can never be exceeded.